Fuel-economizer.



E. B. FREEMAN.

FUEL EGONOMIZER. APPLICATION FILED JULY 19, 1907.

maslla SHEETS-SHEET l.

, E. B. FREEMAN. FUEL EGONOMIZER. APPLICATION FILED JULY 19, 1907.

1 ,0433 1' 2,, Patented Nov. 5, 1912.

3 SHEETS-SHEET 2.

E. B. FREEMAN.

Patented Nov. 5, 1912.

3 SHEETSSHEET 8.

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esiding at l State I lime luvs" lied certain new ul linprorczucn in l bel-Econoend do hereby declere the followbe full clear, and exact description ol' tlie iui'ention such will enable others skilled in the art to which it uppertuins to iii-eke ,ond use lfie seine.

ln fuel ecouoinizer-s us heretofore conslructecl the vertical circul "ion tubes or pipes are connected of; one o! boil] ends by means of hollow bowlers, sch vertical lube being connected in (no headers by Wu'ifii V Til? conslruct-iou is not only i'lutes the complete esllie ports of each section of the in the factory and 1 l of the set-up seer-ions l the place u'nere ecouoniizru: is lobe uuuol d. in instulliug; the economize? llie licuvy scci on must be bundled which adds l'i-onsideralr to the difliculliy and expense of installation.

To ovoid the necc sit c of assembling the sections of tlie econonnzer at (be factory and. the trouble and expense incident to shipping and bundling the 'e.up sections, and also to i "wide on econcniizer oi. simple construction which can be mmluiuctured end 'ulled more cheaply and easily than econre lllCll llsvc lzerctolore been devised, a i ure oi be yu-escnl inrcnl ion contemplutes :1 "isliruction in avllicli lire oircul-ir tiou Tubes l --u"':porled by headers or tube siuisporters witnouii being ioiuted lllQ'l'Q lO and in .rllicli the tubes are connected by ii:iu:ti1ig l'lie econoinizer iii illlS manner the parts can be made more easily and cbeuply than has heretofore been possible lcllli they can, be shipped to the places of iwfll loiion and there readily assembled. This suture of the presentinvenl'ion bromlly considered contemplales any suitable form of circulation tubes tube suppm-l'ers and coupling pipes. In the preferred lorni of the nvention, bowerer, lbe circulutirm tubes consist of U I bum, in the cltulnty bu, l

shaped pipes arranged vertically and supi rueut' l'llfilifOll, lrIi-WSAGHUSETTS, A COREORATIQN OF MASSACHUSETTS.

ported at their upper ends by horizontally arranged tube supporters. The circulation tubes are preferably arranged iii rows crosswise or" the economizer as is usual in this class of devices, and the tubes in each row are preferably connected by the coupling pipes in series so that the tubes and coupling pipes form a continuous passage for the water from one end of a row of tubes to the other. Also preferably the rows of tubes of the economizer are connected in series so that a continuous passage for the Water is formed from one end of the economizer to the other.

ln oddition'to the features of invention above referred to, the present invention consisis in certain devices and arrangements of ports hereinafter described and claimed, the urlvuuliugi-is of which will be obvious to those iled in the art from the following description. The re eral features of the presentins'enlion will. be clearly understood from an inspection of the accompanying drawings in WlllCll Figure 1 is it View in end elevutionpartly in section of a fuel ecouomizer embodying the sznne in its preferred form. Fig. 2 is a plan View, with one of the coupling pipes removed, of the circulation tubes, tube supporters and coupling pipes of the econoiuizerz. Fig. 3 is a sectional plan View of the ports illustrated in 2, a view being on a plane passing through the center of the tube supporters and the reinuinder of the View being on a plane pass- I vertical tubes so that the tubes and coupling .plpes form a continuous passageway for the portion of said i g ends they water. tion tubes consist of --U- shaped cast iron pipes provided with flanges 4 at their upper ends which extend over the tube supporters as best illustrated in Figs. 2 and 4. At its upper end each vertical tube is provided with a bevel joint seat as indicated at 5 in Fig. 4 and the coupling pipes 3 are provided at their ends with corresponding bevel joint seats to engage the joint seats of the Vertical tubes. A metal to metal joint is thus formed which does not require any packing. The coupling pipes are preferably of'cast iron and are U- shaped as illustrated. At their these flanges as well as the flanges at the upper 'ends of the vertical tubes are perforated to receive clamping bolts 7 by meansof which the con-pling pipes and vertical tubes are firmly secured together.

The manner in which the vertical tubes are connected by the coupling pipes so as to form a c ntinuous passage for the Water from one end of the economizer to the other will be readily apparent from an inspection of Fig. 2 in which it will be seen that the tubes of each row are connected in series and that the rows are also connected in series. The water enters and leaves the economizer through couplings 8 connected to the end tube in the first and last rows as indicated in Fig. 2. These couplings consist of short Vertical pipes provided with joint'seats and flanges similar to those on the coupling pipes 3.

To permit an air blast to beappliedto the vertical circulation tubes so as to clean the soot therefrom, each tube supporter 2 is provided with an air passage 9, extending its entire length, and with air outlets 10, opening toward the outer sides of the tubes, as best illustrated in Fig. 4. To cause the -air issuing from the outlets 10 to pass down-' wardly along the vertical tubes the tube supporters are provided with laterally extending brackets 11 which surround the 1 tubes as illustrated in Figs. 3 and 5, and the tubes'are held. centrally in the openings formed by these brackets by the lower ends cast in the upper of thebolts 7 whi h are received in recesses surfaces of the tube sup- "porters. To permit the air to pass completely around the circulation tubes the brackets 11 are provided with grooves 12 extending from the outlets 10 nearly to the It will be understood economizer is covered in this class of devices into the grooves 12 is' 'compelled to pass downwardly along the tubes through the openings between the tubesand the brackets 11. ,lt will be noted that spaces are left at the [mm-r portion of the economizer between the As illustrated the vertical circulaare provided with flanges 6 and brackets 11; To close these spaces cover plates 13 are provided which are held in place/ by projections from the underside of the plates asindicated in Figs. 3 and 4. The spaces between the tube supporters at the ends; of the rows of tubes may be covered in any suitable manner- As indicated in Fig. 3;the vertical circulating tubes pass down between the tube supporters. In order to hold the tube supporters in position they are secured to one another by bolts 14 passing through perforated lugs formed on certain of the brackets 11. In. the form of economizer illustrated, the vertical tubes of one row come opposite'the spaces between the vertical tubes of the next row so that the gases passing through the economizers are compelledto follow asinuious path, this arrangement of the tubes producing what is known in the art as a staggered tube economizer.

The air passages of the tube supporters 2 are connected in any suitable manner to means for producing a blast of air. The way in which these connections can be arranged will be obvious to those skilled in the art and it has therefore been considered un-f necessary to illustrate them in the drawings.

The nature and scope of the present invention having been indicated and the preferred form of the invention having been specifically described, what is claimed is 1. l fuel economizer having, in combination, circulation tubes consisting of a' plurality of series of -U shaped pipes,'a plurality of tube supporters supporting said series of ing the U- shaped pipes. v I

2. A fuel economizer having, in combination, a plurality of series of vertical circulation tubes, a plurality of tube supporters supporting the series of tubes and coupling pipes connecting the tubes.

3. A fuel economizer having, in combination, a plurality of series of vertical circulation tubes, a plurality of tube supporters supporting the tubes, .flang'es at the upper ends of the tubes extending 'over the tube coupling plpesconnecting the tubes. v

4. A fuel" economizer havin in combination, circulation tubes consistlng of a plurality of series of U- shaped pipes provided with bevel joint seats at their ends, a plurality of tube supporters supporting the tubes, and coupling plpes for the tubes provided at their ends with bevel joint seats'to engage the joint seatsof-the tubes.

5. A fuel economizer, havinggin combination, circulation tubes consistlng ofla plulty oflseparate tube supporters extending between and supporting said pipes, and cou pling pipes connecting the U-shaped pipes.

6. A fuel economizer, having, in combinapipes and coupling pip'es connect-- rality of series ofU-shape'd pipes, a plural- (H011, a'plurality of series of vertical. circu- In testimony whet-wt I affix my signature,

lation tubes, a plurality of separate tube in presence of two witnesses. supporters extending between and support- 7 ERNEST B. FREEMAN. i'ng the tubes, flanges at the upper ends of Witnesses:

the tubes extending ever the tube support- ALFRED H. H'ILDRET ers, and coilpling plpes connecting the tubes. C. E. SNOW. 

